Integrated Insulation System for Automotive Cryogenic Storage Tanks Team: • Aspen Aerogels (Shannon White) • Energy Florida (Mike Aller, Tim Franta) • Hexagon Lincoln (Norm Newhouse, John Eihusen, Duane Byerly) • IBT (Al Sorkin) • NASA/KSC (James Fesmire, Adam Swanger) • SRNL (Don Anton, David Tamburello) • VENCORE Services and Solutions (Barry Meneghelli) Project ID:ST141 This presentation does not contain any proprietary, confidential, or otherwise restricted information DOE Annual Merit Review, June 9, 2017 https://ntrs.nasa.gov/search.jsp?R=20170005273 2018-07-06T21:47:05+00:00Z
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Integrated Insulation System for
Automotive Cryogenic Storage Tanks
Team:
• Aspen Aerogels (Shannon White)
• Energy Florida (Mike Aller, Tim Franta)
• Hexagon Lincoln (Norm Newhouse, John Eihusen, Duane Byerly)
• IBT (Al Sorkin)
• NASA/KSC (James Fesmire, Adam Swanger)
• SRNL (Don Anton, David Tamburello)
• VENCORE Services and Solutions (Barry Meneghelli)
Project ID:ST141
This presentation does not contain any proprietary, confidential, or otherwise restricted information
• OVERALL: Development of an integrated subscale insulation system
prototype demonstrating the DOE heat leak targets for a cryogenic hydrogen
storage tank for commercially produced fuel cell powered automobiles.
• CURRENT PROJECT YEAR:
o Develop concepts for an integrated insulation system
o Down-select system concepts based on overall system requirements
o Validate system concepts through component testing
3
Relevance
Project Objectives
Collaborations
Project Partners
4
Thermal Modeling
Commercialization
and Marketing
Insulation
Materials
Tanks
Project Lead and
Thermal
Experiments
• FY17
o Complete preliminary design for full-scale storage system In-Progress
o Down-select potential concept technologies In-Progress
o Complete initial component testing
o Update system concept based on costs
• FY18
o Complete sub-scale concept modeling and testing
o Down-select sub-scale concept technology
o Complete sub-scale prototype design
• GO/NO-GO (FY17)
o Evaluate the existing thermal model under the following constraints:
− Full-scale (100 L; utilizing both 3:1 and 6:1 l/d tank geometries) hydrogen storage system
− An insulation system capable of achieving a heat leak ≤ 7W under a reduced vacuum of 0.1 torr
− An insulation thickness of ≤ 2.5 cm
− A measured cold boundary temperature of 80K (modeled at 40K), at an ambient temperature of 300K, and a 300 bar internal tank pressure that vents at 350 bar.
o Ensure that the system can achieve the 2020 DOE Dormancy Targets
− 7 days: Dormancy target time (minimum time until first release of hydrogen from initial 95%
usable capacity)
− 10%: Boil-off loss target (max reduction in stored hydrogen from initial 95% usable capacity
after 30 days)
5
Approach
FY17-FY18 Milestones
6
Approach
Integrated Tank: Elements of Heat Transmission
Penetrations
• F Fill Line [End-A]
• V Evacuation/Service [End-B]
• A Auxiliary / Instrumentation
Structural Supports
• SA Support, End-A
• SB Support, End-B
• SC Support, Side (Cylinder)
Facing Surfaces
• R1 Reflective surface one, Outer of Inner Vessel (zero for e = 0)
• R2 Reflective surface two, Inner of Outer Jacket (zero for e = 0)
Thermal Insulation
• Z1A Insulation Zone 1A, End-A support area
• Z1B Insulation Zone 1B, End-B support area
• Z2A Insulation Zone 2A, End-A support area
• Z2B Insulation Zone 2A, End-B support area
• Z3 Insulation Zone 3, Side (Cylinder)
Insulation Quality Factor (IQF) [degradation; one for each zone]: Q1A, Q1B, Q2A, Q2B, Q3
Integrated insulation system
materials are chosen to minimize
heat loss through each element and,
thus, minimize the full heat load.
7
Approach
Insulation Standards Development
• Cryogenic insulation standards for materials practices and test methods have been
developed that promote global energy efficiency
• Under ASTM International’s Committee C16 on Thermal Insulation, two new standards
are based on CryoTestLab technology and data:
o ASTM C1774 - Standard Guide for Thermal Performance Testing of Cryogenic
Insulation Systems
o ASTM C740 – Standard Guide for Evacuated Reflective Insulation in Cryogenic
Service
• Cryostat Test Instruments selected for iCAT development:
o Cryostat-100, Cylindrical – Absolute, Primary Thermal Data for Insulation
Materials/Systems, 1-m tall by 0.2-m diameter test specimens
o Cryostat-200, Cylindrical – Comparative, Prototype Tank Test, 0.5-m tall by 0.2-m
diameter
o Cryostat-500, Flat Plate – Absolute, Thermal Data for Insulation Materials, up to 25-
mm thickness by 200-mm diameter disk specimens
o Macroflash (Cup Cryostat), Flat Plate – Comparative, Quick Thermal Data for
Structural or Insulation Materials, up to 10-mm thickness by 76-mm diameter disk
specimens
8
Approach
Cryostat Testing of Thermal Insulation Systems
Cryostat-500 (two units) and new Vacuum Stability test apparatus (center)
Cryostat-100 Cylindrical Insulation Test Apparatus (Absolute)
Cryostat-100 and Cryostat-500 provide:
• Full range vacuum (Cold Vacuum Pressure)
• Repeatable testing under representative-use conditions
• Direct energy rate measurement by boiloff calorimetry
• Testing of non-homogenous, non-isotropic materials
• Reference ASTM C1774, Annex A1 and Annex A3
9
Approach
H2 System Model Diagram
Full-scale cryo-compressed H2 storage system:
• 77 K, 300 bar (vent at 350 bar)
• Type 3 Aluminum-Carbon Fiber Tank
• 23-mm thick insulation with supports
• 2-mm outer aluminum shell
• Full Balance of Plant
10
Approach
H2 System Model Analysis
• Analysis Results
o Hydrogen Storage System Design
− Pressure vessel, insulation system, and balance of plant
o Heat load (Q) for both the total hydrogen storage system and for
individual components/sections of the storage system
o Heat flux (q) through both the total hydrogen storage system and the
individual components/section of the storage system
• Inputs and Options
o Pressure vessel design, including all materials and dimensions
o Hydrogen storage method
− Compressed, cold-compressed, cryo-compressed, or liquid
− Adsorbent, metal hydride, or chemical hydride
o Insulation system
− Location and types of support material
− Insulation materials, thickness, and location
− Number and type of penetrations
Capability to design and test
combinations of hydrogen storage
methods and insulation systems.
11
Accomplishments and Progress
Cryostat Thermal Insulation Test Data Mining
• Preliminary Screening Criteria of the Cryogenics Test Laboratory data
libraries containing test results:
o ke < 2 mW/m-K at 100 millitorr CVP; any thickness up to 23-mm
o q < 20 W/m2 at 100 millitorr CVP; based on approx. 23-mm thickness
o Note: iCAT target thickness is 23-mm (max. annular space thickness)
• To date, 20% of over 700 materials/systems have been analyzed (from
over 19 years of data acquisition)
• iCAT target:
o Q < 7 W for 100-liter tank (for 300 K / 78 K boundary temperatures)
o q < 5 W/m2 (approx. for 3:1 tank with 23-mm annular space thickness)
o ks < 0.5 mW/m-K (approx. for total system including all elements)
KSC’s Cryogenics Test Laboratory has 19+ years of insulation test
data available to screen possible insulation and support materials.